What Heidi Schreck's Grand Concourse, at Playwrights Horizons, is really about is only revealed in the final minute. So be assured the wonderfully eye-widening revelation won't be described here. Until then, it could be said Schreck is writing about hope and the slim, but not impossible, chance that a troubled person's desperate hopes can be realized.

This is another way of saying that Schreck doesn't require viewers to sit through her insightful and intermissionless 90 minutes for that ultimate moving, even shocking epiphany. Before she gets to her overriding point, she has plenty going on in the Bronx church at 167th Street and Grand Concourse....